136816217 has 2 divisors, whose sum is σ = 136816218. Its totient is φ = 136816216.

The previous prime is 136816193. The next prime is 136816223. The reversal of 136816217 is 712618631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91604041 + 45212176 = 9571^2 + 6724^2 .

It is a cyclic number.

It is not a de Polignac number, because 136816217 - 2⁸ = 136815961 is a prime.

It is not a weakly prime, because it can be changed into another prime (136816817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68408108 + 68408109.

It is an arithmetic number, because the mean of its divisors is an integer number (68408109).

Almost surely, 2^136816217 is an apocalyptic number.

It is an amenable number.

136816217 is a deficient number, since it is larger than the sum of its proper divisors (1).

136816217 is an equidigital number, since it uses as much as digits as its factorization.

136816217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 136816217 is about 11696.8464553486. The cubic root of 136816217 is about 515.2830529971.

The spelling of 136816217 in words is "one hundred thirty-six million, eight hundred sixteen thousand, two hundred seventeen".